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Welding and Related Processes topics include: Weldability, arc welding equipment and methods, welding types, resistance welding methods, thermit and solid state welding, gas welding, oxygen cutting and oxy-acetylene welding.
Welding is a broad process that can be divided into three groups: fusion welding, pressure welding, and brazing/soldering. Welding processes can also be classified into arc welding, resistance welding, and gas welding.
Here are some types of welding processes: Gas metal arc welding (GMAW/MIG): Also known as metal inert gas welding, this is a semi-automatic or automatic process that uses a continuous wire feed as an electrode and an inert or semi-inert gas mixture to protect the weld from contamination. Flux-cored arc welding (FCAW): An automatic or semiautomatic process that uses a welding electrode that contains a flux core that acts as a shielding agent. FCAW is often used in construction projects, thanks to its high welding speed and portability. Submerged arc welding: Involves forming an arc between the electrode and the workpiece. A blanket of granular fusible material shields the arc on the work. Electron beam welding (EBW): Involves using a beam of high velocity electrons to join parent materials. The kinetic energy of the electrons creates heat when they come into contact with the parent material(s). Electroslag welding: Bonds heavy metal pieces for use in machines and industrial equipment. The process takes place in a vertical position that allows for a clear-eyed view of the work as it takes shape.
Other types of welding processes include: Laser beam welding (LBW), Plasma arc welding, Thermit welding, TIG& MIG welding, & Shielded metal arc welding (SMAW)
Weldability is the ability of a material to be welded under specific conditions and perform satisfactorily in its intended service. It's also known as joinability.
Weldability is a measure of how easy it is to weld a material without cracks. It also measures the material's resistance to degradation and whether it has adequate mechanical properties. Weldability is dependent on five factors of the metal or alloying element: Melting point, Thermal expansion, Thermal conductivity, Surface condition, Change in the microstructure.
Other factors that can influence the weldability of metals include: Welding procedure, Base metal properties, Joint design, Consumables, & Metallurgy of materials
Weldability can be determined from quality of the weld joint, effort and cost required for developing the weld joint.
Tests for weldability include: Controlled Thermal Severity (CTS) test Arc weldability of microalloyed steels Arc weldability of alloy steels Arc weldability of dissimilar metals Developments in fusion welding of stainless steels
Related Topic: Welding
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